Questions asking us to recommend or find a tool, library or favorite off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and what has been done so far to solve it.

I often find myself using this reason to close "what API does X, Y, and Z" questions, specifically Internet-based APIs (like the Stack Exchange API or a weather API). However, it doesn't seem to really fit:

APIs could be tools, but that seems forced. "Tools" make me think of IDEs, regex testers, etc.

APIs are really services, even if they're free. Could we add this to the reason, ending with something like this?

Questions asking us to recommend or find a tool, library, service or favorite off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and what has been done so far to solve it.